Back gauge for paper cutter-drive disconnect for manual operation



Aug. 25, 1953 s. FRANKEL 2,649,912" BACK GAUGE FOR PAPER CUTTER-DRIVE DISCONNECT FOR MANUAL OPERATION v 4 Sheets-Sheet 1 Filed March 25. 1950 (\l N 0 Q F [L I Iv, v I ,5 $1

1 .& Q h w e N I I INVENTOR SYDNEY FRANKEL 1 w BY H g w LC- M ig a- ATTORNEYS Aug. 25, 1953 5, FRANKEL 2,649,912

BACK GAUGE FOR PAPER CUTTER-DRIVE DISCONNECT FOR MANUAL OPERATION Filed March 25, 1950' 4 Sheets-Sheet 2 INVENTOR SY DNEY FRANKEL BY ATTORNEYS Flas Aug. 25, 1953 s. FRANKEL BACK GAUGE FOR PAPER CUTTER-DRIVE 4 Sheqts-She et 3 DISCONNECT FOR MANUAL OPERATION Filed March 25. 1950 7 If ll JNVENTOR SYDNEY F'RANKEL.

BY W sw FIG; 7'

ATTORNEYS Aug. 25, 1953 s. FRANKEL 2,649,912

BACK GAUGE FOR PAPER CUTTER-DRIVE I DISCONNECT FOR MANUAL OPERATION Filed larch 25. 1950 '4 Sheets-Sheet 4 INVENTOR SYDNEY FRANKEL 9 i g avkm ATTORNEYS Patented Aug. 25, 1953 BACK GAUGE'FOR PAPER CUTTER-DRIVE -DISCONNECT FOR MANUAL OPERATION Sydney l rankel, Ridgefield Park, N. J., assignor to E. P. Lawson 00., Inc., New York, N. Y., a

- corporation of New York Application March 25, 1950, Serial No. 151,931

2 Claims. (01. 16459) 1, My present invention relates to a hydraulically operated back gauge for paper cutters and more particularly to a back gauge operating mechanism adapted to move the back gauge through a series of steps to permit thecutter to perform a series of cuts on a paper stack.

This application is filed simultaneously with application Serial No. 151,936 by the same inventor and assignedto the same assignee.

For this purpose in order to obtain speed in operation, the back gauge should move rapidly between cuts. But to ensure that the paper stack will stop at an accurate predetermined cutting position for each cut, the back gauge must be slowed up just before the cutting position so that when it is brought to a stop, the paper stack will not coast beyond the stop position.

Thus, I have provided novel hydraulic back gauge operating means which will move the back gauge rapidly between cuts, will slow the back gauge down just before a cutting position is reached and halt the back gauge at the cutting position.

Where automatic drive members are provided for'the back gauge, these drive members provide excessive resistance to the operation of the back gauge by hand when the back gauge is being adjusted manually to determine the proper stops for the paper stack.

Accordingly, the primary object of my invention is the provision of novel means for disconnecting the automatic drive apparatus from the back gauge when it is desired to adjust the back gauge manually.

This is particularly significant where the drive is a hydraulic one ofiering substantial resistance .to manual operation.

from the back gauge.

Figure 2 is a side View of the cutting machine.

Figure 3 is a vertical section on line 3-3 of Figure 2 through the hand wheel.

Figure 4 is a cross-sectional view on line 4-4 of Figure 3 looking in the direction of the arrows.

' Figure 5 is an end view taken from line 5--5 of Figure 2 with the drive belt taut. a

- Figure 6 isa top view of the belt controlmechan ism taken from'line '6-6 of Figure 5'.

V Figure 7 is a view corresponding to that of Figure, 5with the drive belt slack.

1 figured is an elevation partly in section taken 2 on line 8-8 of Figure 5 looking in the direction of the arrows.

The drive disconnect of the present invention is to be applied to the back'gauge unit described in my application Serial No. 151,936, filed March 25, 1950, and assigned to the assignee of the present application.

The purpose of the present invention is to provide means automatically responsive to operation of hand wheel 2I0 to release the tension on belt 65 of hydraulic motor drive (see Figures 5 and '7) thereby disconnecting hydraulic motor I04 from pulley II and screw 204 so that the hand wheel 230 may be readily used to turn screw 204 and move the back gauge 20I and its paper pile without also being required to operate the hydraulic motor I04.

At the rear of the machine, plate 302 is secured to the underside of bed plate I00. Bracket 30I is attached to plate 302 also by bolts 290, 29I.

A second bracket 303 is secured to the bottom of bracket 302 and supports the hydraulic motor I04. Driving pulley is keyed to the hydraulic motor I04.

The compound V-belt pulley 64--62 is journa-lled on stub shaft 63' which is supported on needle bearings by belt arm 3I0. Belt arm 3I0 consists of two pieces-the upper part 3I0a of Which carries the shaft 63 and the lower part 3l0b which has two trunnions 3, 312 (Figure 8), trunnion 3| I being journalled on the hub 3I4 of the hydraulic motor casing, and trunnion 3I2 being provided with a ball bearing 320 on the drive shaft 32I of hydraulic motor I04.

The upper belt arm 3I0a is slotted at 325 to receive the tongue 326 of lower belt arm 3I0b. Two belt tensioning screws 32'! and two clamping screws 328 are provided in the upper belt arm 310a.

Screws 328 passing through adjacent flanges of belt arm sections SIM and 3I0b serve to integrate the arms. Screws 321 passing through a flange of section 3I0a and bearing against the flange of 3I0b serve to space arm sections 3I0a and '3I0b by appropriate distances to maintain desired tension on belt 6 I.

' Belt 65 as above pointed out connects pulleys II and B4; belt 6I connects pulleys '60 and 62.

Mounted on bracket 30I is solenoid coil 340- with armature 3-4I attached to plunger 342 .by pin 343. Plunger 342 is guided in bracket 345 which is also fastened to bracket 30I p Anchorblock 360 is also fastened to bracket 30I and link 36I is pivoted on pin 302. held in block 360.

The upper part 310a of belt arm 3H] has an ear 3G3 extending to the left with respect to Figure 7 on which link 365 is pivoted by pin 365.

Links 365 and SM are joined by pin 363 which fits into the slotted fork 310 of plunger 3&2. A stop screw 312 is threaded into car 363 whereby links 365 and SM may be aligned or permitted to go slightly above the horizontal when solenoid see is energized and arm 3H1 is swung to the position for tightening belt 65 shown in Figure 5.

When solenoid 34K! is de-energized, tension of spring 315 on plunger 3M will break the toggle formed by links 3H365 downwardly to the position of Figure '7 and thereby pull belt arm 3!!! to swing to the left and slacken belt 65.

The screw 29% may now be rotated readily in either direction without any drag from hydraulic motor [04 or the associated hydraulic mecha- Bracket 389 is fastened to bracket 30! by screws 38| in slots 382 of bracket 385; and a screw 383 serves as an anchor for one end of spring 315. The other end of spring 315 is connected by pin 334 'to slotted links 335 hung on pin 3% at the lower end of plunger 34!. The purpose of the slots in links 335 is to reduce the amount of load on solenoid 340 and to provide a spring force only to break the links 3S'l-3B5 into toggle relation; thereafter, belt tension and gravity will aid in slackening belt 65 and thereby disconnect screw 294 from the hydraulic motor I64 and its associated hydraulic drive elements.

The solenoid 340 of Figures 1 and to 8 is en-' ergized and de-energized by the closing and opening, respectively, of the micro-switch We on bracket ADI supported by front bearing 235 of back gauge drive screw 2M.

Micro-switch 409 is normally closed so that solenoid 340 is normally energized and the roller and stem 402 of switch 430 must be depressed to interrupt the circuit and thereby de-energize solenoid 340 to slacken belt 65.

Hand wheel 2"] is arranged so that when manually rotated and pushed in, it performs this operation. v

A serrated or multiple splined sleeve 415 is s'ecuredby set screws 41! to screw 234 in front of bearing 206. The hand wheel 210 has an interior bore "M5 with suitable serrations or splines to cooperate with serrations and splines of sleeve 41!]. d

The hand wheel 2H1 is slidably mounted on sleeve 4H} and is confined between the rear washer 1426 on screw shaft 254 and the front washe'r42 I held 'on shaft 204 by nut G22. Thrust "bearing A325 permits relative rotation between washer 420 and bearing 206.

The spacing between washers Q20 and 42! is such as to permit about 3% inch longitudinal movement of hand wheel 2| 0 on screw-shaft 204.

Compression springs 6-30 (preferably four in number) in spring pockets 43! of hand wheel 21!] bear against hand wheel 210 andd'rive it forwardly.

This drives the beveled surface 446 of hand wheel 210 away from the operating stem 432 of micro-switch 408 so that switch 105 is normally closed and thedrive'elements are normally in the position of Figure 5.

Whenever screw 234 is to be turned by hand,

fhand wheel 12 i pushed in whereby-beveled surface 440 of hand wheel 2H] engages the operating stem 402 of switch 480 and opens switch 4 do!) to open the circuit to solenoid 349, thereby de-energizing the same.

As previously described in connection with Figures 5 and 7, this places the drive elements in the condition of Figure '7 so that belt 65 is slackened and the screw 204 may be manually rotated without the drag of the hydraulic mechanism.

When the hand wheel 2H1 is released, springs 430 drive it outwardly causing beveled surface 440 to disengage switch operator i532 and permitting switch 400 to close. This effects the operation described in connection with Figure 5 to tighten belt 65 and reconnect screw 254 with the hydraulic mechanism.

In the foregoing I have described my invention solely in connection with specific illustrative embodiments thereof. Since many variations and modifications of my invention will now be obvious to those skilled in the art, I prefer to be bound not by the specific disclosures herein contained but only by the appended claims.

I claim:

1. In a cutting machine, a cutting table, a back gauge movable along said cutting table, a longitudinal screw connected to and driving said back gauge; the invention for driving said screw which comprises a hand wheel at one end of said longitudinal screw; a first pulley secured to said longitudinal screw to drive the same; a source of power comprising a second pulley; an arm rotatably mounted about the center of rotation of said second pulley; a third pulley at the end of the arm remote from the center of rotation thereof and a first belt connection between said second and third pulley; a fourth pulley concentric with said third pulley; and a second belt connection between said fourth and first pulleys; said arm being rotatable to a position Where said second belt is taut thereby permitting the transmission of power from said second to said first pulley; said arm being also rotatable to a position where said second belt is slack,

thereby disconnecting said second pulley from said first pulley, said hand wheel thereby being enabled to rotate said screw free of the drag of said second pulley; solenoid means controlling the position of said arm; a switch positioned adjacent the hand wheel; said hand wheel being longitudinally movable on said end of said screw; said switch being operated by an inward movement of the hand wheel to cause said solenoid means to operate to move said arm to the slack position of the second belt.

2. In'a cutting machine, a cutting table, a back gauge movable along said cutting table, a longitudinal screw connected to and driving said back gauge; the invention for driving said screw which comprises a hand wheel atone end of said longitudinal screw; a first pulley secured to said longitudinal screw to drive the same; a source of power comprising a second pulley; an arm rotatably mounted about the center of rotation of said second pulley; a third pulley. at the end of the arm remote from the center of rotation thereof and a first belt connection between said second and third pulley; a fourth pulley concentric with said third pulley; and a second belt connection between said fourth and first pulleys; said arm being rotatable to a position where said second belt is taut thereby permitting the transmission of power from said second to said first pulley; said arm being also rotatable'to a-position-where said second belt is slack, thereby'disconnecting said second pulley from said first pulley, a solenoid coil and armature; a link between said armature and said arm; said solenoid coil when energized maintaining said arm in the taut position for the second belt, a spring connected to said armature; said spring operating when the solenoid coil is de-energized to pull said armature and arm to the slack position for the second belt; the length of said arm being adjustable.

SYDNEY FRANKEL.

References Cited in the file of this patent UNITED STATES PATENTS Name D t Number 6 Name Date Valiquette May 9, 1933 Iversen June 11, 1935 OBrien Mar. 30, 1937 Lehman Oct. 11, 1938 OBrien Nov. 29, 1938 Anderson Apr. 25, 1939 Eickman Aug. 27, 1940 Sharp July 1, 1941 Stevens Nov. 5, 1946 Heyer Mar. 6, "1951 

